Alter Aeon Quests

Quest Name: Saved the city of Koralia's Heart from certain doom.
Location: The City of Koralia's Heart
Area Level: 34
Approximate rarity (scale from 1 to 9): 4
Average level of players who complete it: 29
Koralia's Heart, held up by magic since its founding, is suddenly falling
apart. What could be causing this, and can you help?